I've found the most useful windscreen information has been from a rider who has personally tried several and can provide direct comparisons. I've now used the original screen, the Yamaha Double Bubble, and Puig Touring so here are my summary thoughts. Hope this is helpful for riders seeking solutions for wind buffeting issues. Qualifier: I am 5'9" and ride in an upright position all the time (virtually never tuck).
1) original screen, if you're still using it I recommend you do yourself a BIG favor and get an upgrade, or just remove it or cut it down, it 'creates' significant air turbulence even at slow speeds, seriously!
2) Yamaha Double Bubble (Puig Racing screen probably falls in this category as well although I haven't personally tried it), significantly smoother air flow at low speeds and acceptable up to about 60mph/100kph.
3) Puig Touring, excellent at low speeds and VERY good at sustained higher speeds up to 80mph/130kph (I don't rider faster than that), I can feel air movement around my shoulders and chest but no actual pressure or turbulence and it's like my helmet is sitting in a pocket of very still smooth air with very little pressure even when turning my head for shoulder checks (was very surprising when I first felt it).
I will be leaving the Puig Touring on the
bike unless it just feels like it's blocking too much air in the hot summer days, then I'll go to the Double Bubble or go Naked (only takes 5 min. to switch windscreens). Lots of other windscreen threads on here . . but I hope this consolidated summary helps someone